Re: [Patch, _eh, dawin, Version2] Allow targets to suppress epilogues in _eh frames.

[IainS <developer at sandoe-acoustics dot co dot uk>]

Hi Richard,

On 16 Aug 2010, at 17:18, Richard Henderson wrote:

<snipped > .... other points taken on board....

> Also, I'm noticing that dwarf2out.c uses  
> flag_asynchronous_unwind_tables
> in places where it really means cfun->can_throw_non_call_exceptions.
> In fact, almost all occurrences of f_a_u_t in dwarf2out.c are in  
> error.
> The only exception that I can see off-hand is in fde_needed_for_eh_p,
> which would need an extra check vs cfun- 
> >can_throw_non_call_exceptions.

How should we proceed on this?

And also there is the remaining question about the GNU-specific code  
(which I fear will get re-enabled when the stuff above is fixed).

... should I expect a dwarf-2-strict target  to be able to interpret  
that code?

... or should I be able to replace it with a (possibly less efficient)  
sequence that is dwarf-2-strict?

> All of which affects the changes that you need to make within  
> toplev.c.

OK - although (independent of this patch) it seems to me that toplev.c  
is overriding a user flag without any diagnostic.

thanks for reviewing,
Iain